three swords 6

打完疫苗 感觉不痒不痛

        System.out.println("90 度的正弦值:" + Math.sin(Math.PI/2));  
        System.out.println("0度的余弦值:" + Math.cos(0));  
        System.out.println("60度的正切值:" + Math.tan(Math.PI/3));  
        System.out.println("1的反正切值: " + Math.atan(1));  
        System.out.println("π/2的角度值:" + Math.toDegrees(Math.PI/2));  
        System.out.println(Math.PI);  
90 度的正弦值:1.0
0度的余弦值:1.0
60度的正切值:1.7320508075688767
1的反正切值: 0.7853981633974483
π/2的角度值:90.0
3.141592653589793

https://blog.csdn.net/chelen_jak/article/details/80451819

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